import java.awt.*; import javax.swing.*; public class WuJiaoXing extends JPanel { public WuJiaoXing() { this.setSize(800, 800); } public void paint(Graphics g) { int c1, c2, c3, w, h, r; c1 = (int) (255); c2 = (int) (0); c3 = (int) (0); Color c = new Color(c1, c2, c3);// 随机生成颜色的红绿蓝通道值 g.setColor(c);// 设置画笔颜色 w = (int) (Math.random() * 1000); h = (int) (Math.random() * 800); r = (int) (Math.random() * 80); wujiaoxing(g, w, h, r, "fill"); } public void wujiaoxing(Graphics g, int x0, int y0, int r, String f) { double ch = 72 * Math.PI / 180;// 圆心角的弧度数 int x1 = x0, x2 = (int) (x0 - Math.sin(ch) * r), x3 = (int) (x0 + Math .sin(ch) * r), x4 = (int) (x0 - Math.sin(ch / 2) * r), x5 = (int) (x0 + Math .sin(ch / 2) * r); int y1 = y0 - r, y2 = (int) (y0 - Math.cos(ch) * r), y3 = y2, y4 = (int) (y0 + Math .cos(ch / 2) * r), y5 = y4; int bx = (int) (x0 + Math.cos(ch) * Math.tan(ch / 2) * r); int by = y2; Polygon a = new Polygon(); Polygon b = new Polygon(); a.addPoint(x2, y2); a.addPoint(x5, y5); a.addPoint(bx, by); b.addPoint(x1, y1); b.addPoint(bx, by); b.addPoint(x3, y3); b.addPoint(x4, y4); if (f.equals("draw")) { g.drawPolygon(a); g.drawPolygon(b); } if (f.equals("fill")) { g.fillPolygon(a); g.fillPolygon(b); } } public static void main(String[] args) { new f(); } } class f extends JFrame { WuJiaoXing a = new WuJiaoXing(); public f() { this.setSize(800, 800); setLocation(100, 100); this.add(a); this.setVisible(true); } }
public class No6_01 extends Applet
{
// 顶点X,Y的坐标
int X[]={100,140,40,160,60};
int Y[]={50,170,100,100,170};
public void paint(Graphics g)
{
g.drawPolygon(X,Y,5);
}
}
public class No6_01 extends Applet
{
// 顶点X,Y的坐标
int X[]={100,140,40,160,60};
int Y[]={50,170,100,100,170};
public void paint(Graphics g)
{
g.drawPolygon(X,Y,5);
}
}